# US 10,483,546 B2 · Use of xanthan gum as an anode binder

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- Number: US 10,483,546 B2
- Document ID: US10483546B2
- Status: Granted
- Kind: B2
- Application number: 15/462,216
- Filed: 2017-03-17
- Published: 2017-07-06
- Granted: 2019-11-19
- Earliest claimed: 2010-04-23
- Assignees: National Research Council of Canada
- Applicants: National Research Council of Canada
- Inventors: Fabrice Courtel; Yaser Abu-Lebdeh
- Web page: https://patentgrep.com/patent/US10483546B2

## CPC

- H01M 4/622: {being polymers}
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/621: {Binders}
- H01M 4/625: {Carbon or graphite}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/052: Li-accumulators
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Xanthan gum has been found to be a superior binder for binding an electrode, especially an anode, in a lithium-ion or lithium-sulfur battery, being able to accommodate large volume changes and providing stable capacities in batteries tested with different types of anode materials.

## Claims

### Claim 1

An electrode consisting essentially of: an electrode active material into which lithium is intercalated, a conductive carbon, and a binder; wherein the electrode active material is an oxide, or a homogeneous matrix of an oxide and a conductive carbon, and wherein the binder comprises xanthan gum.

### Claim 2 (depends on 1)

The electrode according to claim 1, wherein the electrode active material is an oxide.

### Claim 3 (depends on 1)

The electrode according to claim 1, wherein the electrode active material is a homogeneous matrix of an oxide and a conductive carbon.

### Claim 4 (depends on 3)

The electrode according to claim 3, wherein the conductive carbon in the homogeneous matrix comprises graphite.

### Claim 5 (depends on 1)

The electrode according to claim 1, wherein the oxide or the oxide in the homogenous matrix is a metal oxide.

### Claim 6 (depends on 1)

The electrode according to claim 1, wherein the oxide or the oxide in the homogenous matrix is aluminum oxide, tin oxide, silicon oxide, cobalt oxide, iron oxide, titanium oxide, copper oxide, or a mixture of two or more thereof.

### Claim 7 (depends on 1)

The electrode according to claim 1, wherein the oxide or the oxide in the homogenous matrix is tin oxide or silicon oxide.

### Claim 8 (depends on 1)

The electrode according to claim 1, wherein the binder consists essentially of xanthan gum.

### Claim 9

An anode for a lithium-ion or lithium-sulfur battery comprising a lithium-containing material bound by a binder, the binder consisting essentially of xanthan gum.

### Claim 10 (depends on 9)

The anode according to claim 9, wherein the lithium-containing material consists essentially of Li—S, a lithium alloy, lithium intercalated into a conductive carbon, lithium intercalated into an oxide, lithium intercalated into a nitride, lithium intercalated into a phosphide or lithium intercalated into silicon.

### Claim 11 (depends on 9)

The anode according to claim 9, wherein the lithium-containing material consists essentially of lithium intercalated into an oxide.

### Claim 12 (depends on 9)

The anode according to claim 9, wherein the lithium-containing material consists essentially of lithium intercalated into a metal oxide.

### Claim 13 (depends on 9)

The anode according to claim 9, wherein the lithium-containing material consists essentially of lithium intercalated into an aluminum oxide, tin oxide, silicon oxide, cobalt oxide, iron oxide, titanium oxide, copper oxide or a mixture of two or more thereof.

### Claim 14 (depends on 9)

The anode according to claim 9, wherein the lithium-containing material consists essentially of lithium intercalated into tin oxide or lithium intercalated into silicon oxide.

### Claim 15 (depends on 9)

The anode according to claim 9, wherein the lithium-containing material consists essentially of lithium intercalated into a mixed metal oxide.